|Formula|color|symmetry|space group|No|Pearson symbol|a (pm)|b (pm)|c (pm)|Z|density, g/cm3|
|---|---|---|---|---|---|---|---|---|---|---|
|Pa|silvery-gray|tetragonal|I4/mmm|139|tI2|392.5|392.5|323.8|2|15.37|
|PaO||rocksalt|Fm3m|225|cF8|496.1|||4|13.44|
|PaO2|black|fcc|Fm3m|225|cF12|550.5|||4|10.47|
|Pa2O5|white||Fm3m|225|cF16|547.6|547.6|547.6|4|10.96|
|Pa2O5|white||orthorhombic|||692|402|418|||
|PaH3|black|cubic|Pm3n|223|cP32|664.8|664.8|664.8|8|10.58|
|PaF4|brown-red|monoclinic|C2/c|15|mS60||||2||
|PaCl4|green-yellow|tetragonal|I41/amd|141|tI20|837.7|837.7|748.1|4|4.72|
|PaBr4|brown|tetragonal|I41/amd|141|tI20|882.4|882.4|795.7|||
|PaCl5|yellow|monoclinic|C2/c|15|mS24|797|1135|836|4|3.74|
|PaBr5|red|monoclinic|P21/c|14|mP24|838.5|1120.5|1214.6|4|4.98|
|PaOBr3||monoclinic|C2|||1691.1|387.1|933.4|||
|Pa(PO3)4||orthorhombic||||696.9|895.9|1500.9|||
|Pa2P2O7||cubic|Pa3|||865|865|865|||
|Pa(C8H8)2|golden-yellow|monoclinic||||709|875|1062|||

Question: how many compounds are some shade of yellow in color?
Answer: 3